> If one believes in a literal *biblical* Eve, that would have been an
> instantaneous speciation event with would cause a severe populational
> bottleneck. That would have to be detectable using coalescent theory.

Yep, and that is what many apologists believe. If there were a speciation
event starting with the smallest possible population (2), then all the
genetic variability we observe in humans would have to have evovled since
that event. If it were within the past 60,000 years, I submit that
coalescent theory would indeed see it very clearly for the vast majority of
genes! It doesn't.